Transfer Answer

When processing a <Transfer> verb, this event is sent when a called party (B-leg) answers. The event is sent to the endpoint specified in the transferAnswerUrl attribute of the <PhoneNumber> tag that answered. BXML returned by this callback will be executed for the called party only. After all BXML has been executed, the called party will be bridged to the original call.

Most BXML verbs are allowed in response to a transferAnswer event, but some are not allowed. A full list of verbs and whether or not they are allowed:

Verb	Allowed
Bridge	No
Conference	No
Forward	No
Gather	Yes
Hangup	Yes
Pause	Yes
PauseRecording	Yes
PlayAudio	Yes
Record	Yes
Redirect	Yes
ResumeRecording	Yes
Ring	Yes
SendDtmf	Yes
SpeakSentence	Yes
StartGather	Yes
StartRecording	Yes
StopGather	Yes
StopRecording	Yes
Tag	Yes
Transfer	No

Request Parameters

Property	Description
eventType	The event type, value is transferAnswer.
eventTime	The approximate UTC date and time when the event was generated by the Bandwidth server, in ISO 8601 format. This may not be exactly the time of event execution.
accountId	The user account associated with the call.
applicationId	The id of the application associated with the call.
from	The provided identifier string of the caller used in the from field of the original call.
to	The phone number used in the to field of the original call, in E.164 format (e.g. +15555555555).
direction	The direction of the call. Always outbound for this event.
callId	The call id of the newly-created B leg.
parentCallId	The call id of the original call leg that executed the <Transfer> tag.
callUrl	The URL of the call associated with the event.
enqueuedTime	(optional) If call queueing is enabled and this is an outbound call, time the call was queued, in ISO 8601 format.
startTime	Time the call was started, in ISO 8601 format.
answerTime	Time the call was answered, in ISO 8601 format.
tag	(optional) The tag specified earlier in the call. If no tag was specified or it was previously cleared, this field will not be present.
transferCallerId	The phone number used as the from field of the B-leg call, in E.164 format (e.g. +15555555555) or one of Restricted, Anonymous, Private, or Unavailable.
transferTo	The phone number used as the to field of the B-leg call, in E.164 format (e.g. +15555555555).

Expected Response

HTTP/1.1 200
Content-Type: application/xml; charset=utf-8

<Response>
    <!-- Valid, executable BXML verbs to play to the called party -->
</Response>

Examples

Transfer Answer Event

POST http://yourUrl.example/transferAnswer
Content-Type: application/json

{
	"eventType"        : "transferAnswer",
	"eventTime"        : "2019-06-20T15:57:22.477Z",
	"accountId"        : "55555555",
	"applicationId"    : "7fc9698a-b04a-468b-9e8f-91238c0d0086",
	"from"             : "+15551112222",
	"to"               : "+15553334444",
	"direction"        : "outbound",
	"callId"           : "c-95ac8d6e-1a31c52e-b38f-4198-93c1-51633ec68f8d",
	"parentCallId"     : "c-2a913f94-6a486f3a-3cae-4034-bcc3-f0c9fa77ca2f",
	"callUrl"          : "https://voice.bandwidth.com/api/v2/accounts/55555555/calls/c-95ac8d6e-1a31c52e-b38f-4198-93c1-51633ec68f8d",
	"startTime"        : "2019-06-20T15:54:22.234Z",
	"answerTime"       : "2019-06-20T15:54:25.432Z",
	"transferTo"       : "+15556667777",
	"transferCallerId" : "+15551112222"
}

Transfer Answer Event with Enqueued Time

POST http://yourUrl.example/transferAnswer
Content-Type: application/json

{
	"eventType"        : "transferAnswer",
	"eventTime"        : "2019-06-20T15:57:22.477Z",
	"accountId"        : "55555555",
	"applicationId"    : "7fc9698a-b04a-468b-9e8f-91238c0d0086",
	"from"             : "+15551112222",
	"to"               : "+15553334444",
	"direction"        : "outbound",
	"callId"           : "c-95ac8d6e-1a31c52e-b38f-4198-93c1-51633ec68f8d",
	"parentCallId"     : "c-2a913f94-6a486f3a-3cae-4034-bcc3-f0c9fa77ca2f",
	"callUrl"          : "https://voice.bandwidth.com/api/v2/accounts/55555555/calls/c-95ac8d6e-1a31c52e-b38f-4198-93c1-51633ec68f8d",
	"enqueuedTime"     : "2019-06-20T15:52:59.308Z",
	"startTime"        : "2019-06-20T15:54:22.234Z",
	"answerTime"       : "2019-06-20T15:54:25.432Z",
	"transferTo"       : "+15556667777",
	"transferCallerId" : "+15551112222"
}